28464729 has 16 divisors (see below), whose sum is σ = 39380160. Its totient is φ = 18273600.

The previous prime is 28464721. The next prime is 28464739. The reversal of 28464729 is 92746482.

It is not a de Polignac number, because 28464729 - 2³ = 28464721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28464721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9942 + ... + 12480.

It is an arithmetic number, because the mean of its divisors is an integer number (2461260).

Almost surely, 2^28464729 is an apocalyptic number.

It is an amenable number.

28464729 is a deficient number, since it is larger than the sum of its proper divisors (10915431).

28464729 is a wasteful number, since it uses less digits than its factorization.

28464729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its digits is 193536, while the sum is 42.

The square root of 28464729 is about 5335.2346715023. The cubic root of 28464729 is about 305.3296766670.

The spelling of 28464729 in words is "twenty-eight million, four hundred sixty-four thousand, seven hundred twenty-nine".